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AlekseyPX
2 years ago
14

Scientists say we should sleep 3/8 of a day.How about many hours is this

Mathematics
2 answers:
SOVA2 [1]2 years ago
6 0

Answer:

\huge\color{skyblue}\boxed{\colorbox{black}{Answer ☘}}

number of hours in a day = 24

according to scientists ,

we should sleep number of hours = 3/8

therefore ,

\frac{3}{8} \: of \: 24 \: hours =  \frac{3}{8}  \times 24 \\  =  > 9 \: hours

hope helpful~

victus00 [196]2 years ago
4 0

Answer:

9 hours

Step-by-step explanation:

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WATU
blondinia [14]

Answer:

12.24

Step-by-step explanation:

13.48-1.24=12.24

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2 years ago
George and Paul use a metal alloy that is 18.1% copper to make jewelry. How many ounces of an alloy that is 14% copper must be m
ella [17]

Answer:

Use 49 ounces of the 14% allow and 41 ounces of the 23% alloy.

Step-by-step explanation:

Each ounce of the 14% copper contains 0.14 ounce of pure copper.

Each ounce of the 23% copper contains 0.23 ounce of pure copper.

Each ounce of the 18.1% copper contains 0.181 ounce of pure copper.

Use x ounces of the 14% and y ounces of the 23% to make 90 ounces of 18.1% alloy.

x+y  = 90

y = 90-x

0.14x + 0.23y = 0.181·90

0.14x + 0.23(90-x) = 16.29

0.14x + 20.7 - 0.23x = 16.29

-0.09x + 20.7 = 16.29

4.41 = 0.09x

x = 49

y = 90-x = 41

Use 49 ounces of the 14% allow and 41 ounces of the 23% alloy.

7 0
3 years ago
Factor 2x4 - 20x2 - 78.
Airida [17]

Answer:

2x⁴ - 20x² - 78

To factor the expression look for the LCM of the numbers

LCM of the numbers is 2

Factorize that one out

That's

2( x⁴ - 10x² - 39)

Hope this helps

7 0
3 years ago
Read 2 more answers
What is the answer to 5x+2<17
chubhunter [2.5K]

x < 3

hope it helps :)

5 0
3 years ago
Read 2 more answers
Y = 5x – 6<br> Identify the slope of the<br> following equation.
shtirl [24]

Answer:

Slope = 5

Step-by-step explanation:

y = mx + b

m = slope

m = 5

3 0
3 years ago
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